JP5465090B2 - Fuel saving driving support system and method - Google Patents

Description

  The present invention relates to a system that supports fuel-saving driving of a vehicle, and more particularly to a technique for generating advice on fuel-saving driving for a user.

  Conventionally, an apparatus that supports fuel-saving driving of a vehicle has been proposed (see, for example, Patent Document 1). In the conventional apparatus, the fuel consumption is calculated for each driver, and advice is given to the driver based on the increase / decrease in the fuel consumption. Specifically, advice for improving the fuel efficiency is notified to the driver about the driving operation and the running state with poor fuel efficiency extracted for each driver. In this way, in the conventional device, the driver is made aware of the operation for improving the fuel consumption, and the operation suitable for improving the fuel consumption is encouraged.

JP 2008-163781 A

  However, in the conventional device, when generating advice for a driver, only consideration is given to whether or not the driving operation or driving state has poor fuel consumption, and the advice can be realized for the driver. No consideration is given to whether or not fuel-saving driving.

  For example, fuel-saving driving that no other driver traveling on the same road can realize is unlikely to be realized for that driver. Therefore, even if the driver is advised of fuel-saving driving advice that is unlikely to be realized, it is difficult to improve the driver's fuel-saving driving. Nevertheless, in the case of a driving operation or driving state with poor fuel consumption, the conventional device notifies the driver of such low-feasibility fuel-saving driving advice. become.

  On the contrary, if it is a fuel-saving driving that can be realized by another driver traveling on the same road, there is a high possibility that the driver can also realize it. Therefore, if the driver is advised of fuel-saving driving advice that is unlikely to be realized, the driver's fuel-saving driving should be improved. However, in the case of a driving operation or a driving state in which the fuel consumption is not so bad in the conventional device, even such highly feasible fuel-saving driving advice is not notified to the driver. .

  As described above, the conventional device has not been considered at all as to whether or not the advice can be realized for the driver, and thus there is a problem that the driver's fuel-saving driving cannot be improved appropriately. It was.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a fuel-saving driving support system that can generate fuel-saving driving advice that may be realized by a user.

  The fuel-saving driving support system of the present invention is a fuel-saving driving support system comprising a client device mounted on a vehicle and a server device connected to be communicable with the client device, wherein the client device is A parameter calculation unit that calculates a fuel saving evaluation parameter that evaluates the degree of realization of the user's fuel saving driving for each driving state of the vehicle based on the driving history data when the user drives the vehicle; An upload unit for uploading fuel efficiency evaluation parameters to the server device; and an advice generation unit for generating fuel-saving driving advice for the user, wherein the server device is a plurality of users uploaded from a plurality of client devices. A storage unit that stores the fuel efficiency evaluation parameters of the A parameter comparison unit that compares the fuel efficiency evaluation parameter of the user of the one client device and the fuel efficiency evaluation parameter of the user of the other client device with reference to the storage unit based on the request of A response transmission unit that transmits a comparison result in the parameter comparison unit to the one client device as a response, and the advice generation unit is based on the comparison result included in the response from the server device. , Generating the fuel-saving driving advice.

  Thereby, in the client device mounted on the vehicle, the fuel saving evaluation parameter (the user's fuel saving evaluation parameter) for each driving state of the vehicle is calculated based on the driving history data when the user drives the vehicle. Uploaded to the server device. The storage unit of the server device stores fuel efficiency evaluation parameters of a plurality of users (for example, users A to Z), and based on a request from a certain client device, the user of the client device (for example, user A) The fuel saving evaluation parameter is compared with the fuel saving evaluation parameters of the users (for example, users B to Z) of other client devices, and the comparison result is transmitted as a response to the client device (client device that sent the request). In the client device, advice on fuel-saving driving is generated based on the comparison result included in the response from the server device. In the present invention, when generating fuel-saving driving advice for a certain user (for example, user A), the degree of realization of the user's fuel-saving driving and the fuel-saving driving of other users (for example, users B to Z). The result of comparison with the degree of realization is considered. Therefore, another user (for example, user B) has realized fuel-saving driving for a certain traveling state (for example, a stop state, an acceleration state, a deceleration state, a constant speed traveling state, a stop-and-go traveling state, etc.) ( If the user (for example, user A) has not achieved fuel-saving driving (the degree of realization is low) in spite of the high degree of realization, advice on the fuel-saving driving in the traveling state is generated. The In this manner, it is possible to generate fuel-saving driving advice that has a possibility (room for improvement) that can be realized for the user (for example, user A). Therefore, the fuel-saving driving of the user (for example, user A) can be improved appropriately.

  In the fuel-saving driving support system of the present invention, the client device further includes a scene estimation unit that estimates a driving scene of the vehicle based on the travel history data, and the uploading unit includes a driving scene of the vehicle. The fuel efficiency evaluation parameter for each is uploaded to the server device, and the parameter comparison unit, for each driving scene of the vehicle, is the highest value among the values of the fuel efficiency evaluation parameters of the users of the other client devices. The difference value with the value of the fuel efficiency evaluation parameter of the user of the one client device is obtained as the comparison result, and the advice generator generates the fuel efficiency with the maximum difference value for each driving scene of the vehicle. The fuel-saving driving advice may be generated for the running condition of the vehicle as the evaluation parameter.

  Thereby, in the client device, based on the travel history data, a vehicle driving scene (for example, a scene in which a general road is traveling at an average vehicle speed of 20 km / hour, that is, a scene in which a congested general road is being driven). Etc.) are estimated and uploaded to the server device. In the server device, when there is a request from a certain client device, for each driving scene of the vehicle, the value of the fuel efficiency evaluation parameter of the user of the client device (for example, the evaluation value of the acceleration state of the user A: 5, the user The evaluation value of the deceleration state of A: 3) and the maximum value of the fuel efficiency evaluation parameter values of the users of other client devices (for example, the evaluation value of the acceleration state of the user B: 10, evaluation of the deceleration state of the user C) Value: 4) (for example, acceleration state difference value: 5 = 10-5, deceleration state difference value: 1 = 4-3). In this case, that the difference value is large means that the possibility (room for improvement) that can be realized for the user (for example, user A) is large. Then, in the client device, the fuel-saving driving advice is generated for the traveling state (for example, the acceleration state) in which the difference value is the maximum in each driving scene of the vehicle. In this way, fuel-saving driving advice that is likely to be realized by the user for each driving scene of the vehicle (for example, “On a busy road, look closely at the movement of the previous car and ”Let's try to accelerate slowly after opening.” Can be generated, so that the user's fuel-saving driving can be appropriately improved for each driving scene.

  In the fuel-saving driving support system of the present invention, the advice generation unit includes at least one of route parts included in a searched route searched by a navigation device that performs route guidance from the departure point of the vehicle to a destination. The fuel-saving driving advice may be generated for the two.

  As a result, fuel-saving driving advice is generated on the route portion (for example, road A) included in the searched route (for example, departure place → road A → road B → road C → destination) searched by the navigation device. . Therefore, when route guidance is performed by the navigation device, advice on fuel-saving driving useful for traveling along the route portion can be obtained, and the user's fuel-saving driving can be appropriately improved.

  In the fuel-saving driving support system of the present invention, the advice generation unit may generate the fuel-saving driving advice for a specific route portion designated by the user.

  Thereby, the advice of the fuel-saving driving | operation in the specific path | route part (for example, road D) designated by the user is produced | generated. Therefore, for example, if the user designates a route portion (for example, road D) on the map, advice on fuel-saving driving useful when traveling on the route portion is obtained, and the user's fuel-saving driving is appropriately performed. Can be improved.

  In the fuel-saving driving support system of the present invention, the advice generation unit may not generate the fuel-saving driving advice when the length of the route portion is shorter than a predetermined reference length.

  Thereby, when the length of the route portion is short (for example, when the length of the road A is 5 m), the fuel-saving driving advice in the route portion is not generated. In this way, when the fuel saving effect is low, the creation of advice is suppressed, and the user's fuel saving driving can be improved appropriately.

  In the fuel-saving driving support system of the present invention, the advice generation unit may generate the fuel-saving driving advice for the specific driving scene specified by the user.

  Thus, fuel-saving driving advice is generated in a specific driving scene designated by the user (for example, a scene driving on a crowded general road). Therefore, for example, if a user designates a certain driving scene, advice on fuel-saving driving useful in such driving scene can be obtained, and the user's fuel-saving driving can be appropriately improved.

  In the fuel-saving driving support system of the present invention, the server device performs the fuel-saving driving operation based on the comparison result in the parameter comparison unit based on a request from the user's second client device. You may provide the 2nd advice production | generation part which produces | generates an advice, and the advice transmission part which transmits the said fuel-saving driving | operation advice produced | generated by the said 2nd advice production | generation part to the said 2nd client apparatus.

  As a result, the server device generates fuel-saving driving advice for the user based on a request from the user's second client device (for example, a personal computer device), and transmits the advice to the second client device. . Therefore, the user can obtain advice on fuel-saving driving by using the second client device even from outside the vehicle (for example, at home), and the convenience for the user is improved.

  The method of the present invention is a method used in a fuel-saving driving support system that includes a client device mounted on a vehicle and a server device that is communicably connected to the client device. Calculating a fuel saving evaluation parameter that evaluates a degree of realization of the user's fuel saving driving for each driving state of the vehicle based on driving history data when the user drives the vehicle; In response to uploading parameters to the server device, storing fuel consumption evaluation parameters of a plurality of users uploaded from a plurality of client devices in the storage unit in the server device, and requesting from one client device On the basis of the storage unit and the user of the one client device. In the one client device, comparing the cost evaluation parameter with the fuel efficiency evaluation parameter of the user of another client device, sending the comparison result to the one client device as a response to the request, Generating a fuel-saving driving advice for a user of the one client device based on the comparison result included in the response from the server device.

  Also in this method, as in the above-described system, when generating fuel-saving driving advice for a certain user (for example, user A), the realization degree of the user's fuel-saving driving and other users (for example, users B to B) are generated. The comparison result with the realization degree of the fuel-saving driving of Z) is considered. Therefore, another user (for example, user B) has realized fuel-saving driving for a certain traveling state (for example, a stop state, an acceleration state, a deceleration state, a constant speed traveling state, a stop-and-go traveling state, etc.) ( If the user (for example, user A) has not achieved fuel-saving driving (the degree of realization is low) in spite of the high degree of realization, advice on the fuel-saving driving in the traveling state is generated. The In this manner, it is possible to generate fuel-saving driving advice that has a possibility (room for improvement) that can be realized for the user (for example, user A). Therefore, the fuel-saving driving of the user (for example, user A) can be improved appropriately.

  ADVANTAGE OF THE INVENTION According to this invention, the fuel-saving driving | operation advice which may be implement | achieved for a user is produced | generated, and a user's fuel-saving driving | operation can be improved appropriately.

It is explanatory drawing of a structure of the fuel-saving driving | operation assistance system in the 1st Embodiment of this invention. It is a block diagram of the client apparatus which comprises the fuel-saving driving | operation assistance system of 1st Embodiment. It is a block diagram of the server apparatus which comprises the fuel-saving driving | operation assistance system of 1st Embodiment. It is the figure which showed the flow which calculates a driving scene and a fuel-saving evaluation parameter from driving history data about a specific link (road). It is the figure which showed the flow which calculates a driving scene and a fuel-saving evaluation parameter from driving history data about a specific node (intersection). It is a figure which shows the example of a driving scene. It is a figure which shows the example of a fuel-saving evaluation parameter. It is a figure which shows the example of the difference value of a fuel-saving evaluation parameter. It is the figure which showed the flow which produces | generates the advice of a fuel-saving driving | operation based on the difference value of a driving scene and a fuel-saving evaluation parameter. It is a sequence diagram for demonstrating the flow of operation | movement (advice production | generation) of the fuel-saving driving | operation assistance system of 1st Embodiment. It is explanatory drawing of a structure of the fuel-saving driving assistance system in the 2nd Embodiment of this invention. It is a block diagram of the computer apparatus which comprises the fuel-saving driving | operation assistance system of 2nd Embodiment. It is a block diagram of the server apparatus which comprises the fuel-saving driving | operation assistance system of 2nd Embodiment. It is a sequence diagram for demonstrating the flow of operation | movement (advice production | generation) of the fuel-saving driving assistance system of 2nd Embodiment.

  Hereinafter, a fuel-saving driving support system according to an embodiment of the present invention will be described with reference to the drawings. In the present embodiment, a case of a fuel-saving driving support system applied to a vehicle navigation system or the like will be exemplified.

(First embodiment)
The configuration of the fuel-saving driving support system according to the first embodiment of the present invention will be described with reference to the drawings. FIG. 1 is an explanatory diagram showing the configuration of the fuel-saving driving support system of the present embodiment. As shown in FIG. 1, the fuel-saving driving support system 1 includes a client device 2 mounted on a user's vehicle and a server device 3 installed in a facility such as a center. The server device 3 is communicably connected to the client device 2 via a network 4 (such as the Internet). In FIG. 1, for convenience of explanation, only one vehicle and one client device 2 are shown, but it goes without saying that the number of vehicles and client devices 2 may be two or more.

  FIG. 2 is a block diagram for explaining the configuration of the client apparatus 2. As shown in FIG. 2, the client device 2 includes a CAN 5 (in-vehicle network) that can acquire various vehicle information from a vehicle sensor (not shown) and a navigation device (not shown) mounted on the vehicle. ) Electrically controlling the navigation ECU 6, a user identification unit 7 for identifying a vehicle driver (user) using a smart key system, etc., and an interface unit 8 such as a touch panel or remote control for the user to perform an input operation. (I / F section).

  The client device 2 includes an advice data storage unit 9 that stores advice data for fuel-saving driving. This advice data storage unit 9 stores fuel-saving driving advice data in a table format according to driving scenes (highway traffic congestion scenes, general road congestion scenes, etc.) and driving conditions (stopped state, acceleration state, etc.). (See FIG. 9).

  Further, the client device 2 stores a scene model storage unit 10 that stores a quantification model (scene model) used for estimation of a driving scene, and a quantification model (fuel consumption model) used for calculation of a fuel saving evaluation parameter. A fuel consumption model storage unit 11 is provided.

  The scene model is a quantification model for estimating the driving scene from the average speed of the vehicle and the road type using correct data in which the correlation between the average speed of the vehicle and the road type and the driving scene is recorded. In the fuel consumption model, the correlation between the vehicle travel history data (vehicle speed, acceleration, etc.) and the fuel consumption evaluation parameter (a parameter that evaluates the degree of realization of the user's fuel saving driving for each driving state of the vehicle) is recorded. It is a quantification model for calculating a fuel saving evaluation parameter (evaluation value for every running state of a vehicle) from running history data of a vehicle using correct answer data.

  Formulation models can be used as these quantification models. In the formulation model, for example, statistical methods such as linear multiple regression analysis, principal component analysis, and factor analysis are used. A probabilistic inference model can also be used as the quantification model. As the probability inference model, for example, a Bayesian network or a neural network is used. Here, although explanation is omitted, a known technique can be used for these quantification models.

  The client device 2 includes a travel history data storage unit 12 that stores travel history data of the vehicle. The travel history data includes time information, vehicle information, and road information (see FIGS. 4 and 5). The time information is information of time (time) when the vehicle information and road information are acquired. The vehicle information is mainly information that can be acquired from the CAN 5, and includes, for example, information such as ignition on / off, vehicle speed, acceleration, accelerator opening, brake signal, acceleration sensor signal, and engine speed. The road information is information that can be acquired mainly from the navigation ECU 6, and includes, for example, information such as a road link ID, a link direction, and a road type. The travel history data may include information such as latitude and longitude.

  The client device 2 includes a scene estimation unit 13 that estimates a driving scene of the vehicle based on the travel history data, and a parameter calculation unit 14 that calculates a fuel saving evaluation parameter based on the travel history data. The scene estimation unit 13 uses the scene model stored in the scene model storage unit 10 to estimate a driving scene from vehicle average speed and road type information (obtained from travel history data). Further, the parameter calculation unit 14 uses the fuel consumption model stored in the fuel consumption model storage unit 11 to calculate a fuel saving evaluation parameter (an evaluation value for each vehicle driving state) from vehicle travel history data (vehicle speed, acceleration, etc.). Is calculated. The estimation of the driving scene and the calculation of the fuel saving evaluation parameter will be described in detail later with reference to the drawings.

  The client device 2 also includes a request generation unit 15 that generates a request for the server device 3 when generating fuel-saving driving advice, and a difference value acquisition unit 16 that acquires a response to the request from the server device 3. Yes. The client device 2 includes a communication unit 17 that performs information communication with the server device 3 via the network 4. The request generated by the request generation unit 15 is transmitted to the server device 3 via the communication unit 17. A response (response to the request) returned from the server device 3 is received via the communication unit 17 and acquired by the difference value acquisition unit 16.

  Further, the communication unit 17 has a function of uploading the fuel saving evaluation parameter calculated by the parameter calculation unit 14 to the server device 3 for each driving scene estimated by the scene estimation unit 13. The uploading of the fuel efficiency evaluation parameter may be performed while the vehicle is driving, may be performed when the vehicle arrives at the destination, or is performed at the next engine start (ignition on) of the vehicle. May be. The communication unit 17 corresponds to the upload unit of the present invention.

  And the client apparatus 2 is provided with the advice production | generation part 18 which produces | generates the advice of a fuel-saving driving | operation with respect to a user. In this case, the generation of advice for fuel-saving driving is performed by reading the advice data stored in the advice data storage unit 9. Specifically, based on the comparison result of the fuel saving evaluation parameters included in the response from the server device 3 (response to the request), a certain driving scene (for example, a general road congestion scene) and a driving state (for example, an acceleration state) Etc.) is specified, fuel-saving driving advice data according to the driving scene and driving conditions (for example, “On busy roads, look closely at the movement of the previous car and leave enough space between Then, try to accelerate slowly. ”) Is read (see FIG. 9). The generation of fuel-saving driving advice will be described in detail later with reference to the drawings.

  FIG. 3 is a block diagram for explaining the configuration of the server device 3. As illustrated in FIG. 3, the server device 3 includes a communication unit 19 that performs information communication with the client device 2 via the network 4. The communication unit 19 has a function of receiving fuel efficiency evaluation parameters of a plurality of users uploaded from a plurality of client devices 2. The communication unit 19 also has a function of receiving a request from the client device 2.

  The server device 3 includes a parameter data storage unit 20 that stores fuel efficiency evaluation parameters of a plurality of users uploaded from a plurality of client devices 2, and a parameter update unit 21 that updates data stored in the parameter data storage unit 20. It has. The parameter data storage unit 20 stores fuel efficiency evaluation parameters uploaded from each client device 2 in association with user IDs, travel dates and times, link IDs, link directions, and driving scenes. The parameter update unit 21 updates the data stored in the parameter data storage unit 20 as necessary every time the fuel efficiency evaluation parameter is uploaded from the client device 2. Here, the parameter data storage unit 20 corresponds to the storage unit of the present invention.

  Further, the server device 3 uses the highest value of the fuel economy evaluation parameter values (evaluation values for each driving state of the vehicle) stored in the parameter data storage unit 20 as reference data (a process for obtaining a difference value described later). A reference data storage unit 22 for storing data as reference data) and a reference data update unit 23 for updating data stored in the reference data storage unit 22. The reference data storage unit 22 stores the maximum value (for example, acceleration: 10, deceleration: 4, etc.) among the values of the fuel efficiency evaluation parameters of all users (evaluation values for each driving state of the vehicle). (See FIG. 8). The reference data update unit 23 updates the data stored in the reference data storage unit 22 as necessary every time the fuel efficiency evaluation parameter is uploaded from the client device 2.

  The server device 3 refers to the parameter data storage unit 20 and the reference data storage unit 22 based on a request from a certain client device 2, and the client device 2 (for example, the user A) and other client devices A difference value calculation unit 24 that compares the fuel efficiency evaluation parameters of two users (for example, users B to Z) and obtains a difference value as a comparison result is provided. The difference value calculation unit 24, for each driving scene of the vehicle, the highest value among the fuel saving evaluation parameter values of the users (users B to Z) of the other client devices 2 and the user of the client device 2 that has requested. A difference value (for example, acceleration: 5 = 10-5, deceleration: 1 = 4-3) from the value of the fuel saving evaluation parameter of (user A) is obtained (see FIG. 8). In this case, the difference value calculation unit 24 corresponds to the parameter comparison unit of the present invention.

  Here, an example has been described in which the difference value calculation unit 24 obtains a difference from the highest value among all users. For example, all users have different driving skills (for example, advanced group, intermediate group). The group may be divided into groups (beginner groups), and the difference from the highest value in the group to which the user belongs may be obtained. In this case, the average value of the fuel efficiency evaluation parameters of each user is calculated for each driving scene of the vehicle, and grouping is performed according to the average value. For example, when the average value of the fuel efficiency evaluation parameter of a general road congestion scene of a certain user (user A) is “5”, the user belongs to an intermediate group (average value: group of 4 to 6). . And the difference value calculation part 24 had the request | requirement with the highest value among the values of the fuel-saving evaluation parameter of the user (user KU) of the client apparatus 2 of these intermediate person groups for every driving scene of a vehicle. A difference value (for example, acceleration: 1 = 6-5, deceleration: 0 = 3-3) from the value of the fuel efficiency evaluation parameter of the user (user A) of the client device 2 may be obtained. When the driving skill of the user (for example, user A) is improved, the average value of the fuel saving evaluation parameter is increased, and the user belongs to the advanced group (average value: group of 7 to 10).

  The server device 3 includes a difference value data storage unit 25 that stores data of difference values obtained by the difference value calculation unit 24. In the difference value data storage unit 25, the difference values of the users of all the client devices 2 are stored in association with the user ID, travel date / time, link ID, link direction, and driving scene for each driving state of the vehicle. Yes.

  In addition, the server device 3 includes a response generation unit 26 that generates a response to the request from the client device 2. The response generation unit 26 includes the difference value data obtained by the difference value calculation unit 24 in the response to the request. Therefore, the difference value data obtained by the difference value calculation unit 24 is transmitted to the client device 2 that made the request as a response to the request via the communication unit 19 of the server device 3. In this case, the communication unit 19 corresponds to a response transmission unit of the present invention.

  The operation of the fuel-saving driving support system 1 configured as described above will be described with reference to the drawings.

  Here, first, a process of calculating a driving scene and a fuel saving evaluation parameter from the travel history data will be described with reference to the drawings. This process is performed by the scene estimation unit 13 and the parameter calculation unit 14 of the client device 2.

  FIG. 4 is a diagram illustrating a flow of calculating a driving scene and a fuel saving evaluation parameter from traveling history data for a specific link (road). As shown in FIG. 4, first, data having the same road information (the same link ID and the same link direction) is extracted from the travel history data stored in the travel history data storage unit 12. The data extracted in this way (same link data) includes data that can assume a situation of traveling on a road and data that can assume a situation of traveling near an intersection. For example, when the same link data is arranged in time series, the last several data and the last several percent (ratio to the whole) data can be assumed to travel near the next intersection. Therefore, data that can assume a situation of traveling on a road is extracted from the same link data.

  The scene estimation unit 13 obtains information on the average speed of the vehicle when traveling on the road and information on the road type of the road from the data thus extracted (travel history data), and stores the information in the scene model storage unit 10. Using the stored scene model for the link, the driving scene of the vehicle when traveling on the road is estimated. For example, when the average speed of the vehicle is 10-15 km / h (10 km / h or more and less than 15 km / h) and the road type is a general road, it is estimated as a “general road congestion scene” (see FIG. 6).

  FIG. 6 is a diagram illustrating an example of a driving scene. The “general road congestion scene” is called a simple driving scene, and the “average speed is 10-15 km / h, the road type is a general road” is detailed. It can also be called a driving scene. The simple driving scene is suitable for allowing the user to understand (imagine) the driving scene, and the detailed driving scene is suitable for use in processing in the client device 2 and the server device 3.

  The parameter calculation unit 14 uses the fuel consumption model stored in the fuel consumption model storage unit 11 and uses the fuel extraction model (running history data) thus extracted from the data (running history data) as a fuel saving evaluation parameter (an evaluation value for each driving state of the vehicle). Is calculated. First, the parameter calculation unit 14 determines the traveling state of the vehicle from traveling history data (acceleration, vehicle speed, etc.). When the vehicle is traveling on the road, for example, when the vehicle speed is less than or equal to the threshold value x, it is “stop state”, and when the acceleration is greater than or equal to the threshold value y for a certain period of time, it is “acceleration state”. When the vehicle speed is equal to or greater than the threshold value z and the acceleration / deceleration is equal to or less than the threshold value j, it is “constant speed running state”, and when the deceleration is equal to or less than the threshold value k for a certain time, it is “decelerated state”. When the vehicle speed is equal to or less than the threshold value l and not in the stop state, it is determined that the state is “stop and go state”.

  Next, the parameter calculation unit 14 obtains “user fuel consumption” for each driving state. For example, from the data such as the vehicle speed, acceleration, engine speed, accelerator opening, and travel distance included in the travel history data in the acceleration state section, a user fuel consumption model is used to calculate “acceleration state user fuel consumption: yy (ml / ml km) ”. Further, the parameter calculation unit 14 obtains “ideal fuel consumption” for each traveling state. For example, “ideal fuel consumption in acceleration state: YY (ml / km)” is obtained from the initial vehicle speed, travel distance, and the like in the acceleration state section using an ideal fuel consumption model. Then, the parameter calculation unit 14 obtains the “value of fuel consumption evaluation parameter (evaluation value)” from “user fuel consumption” and “ideal fuel consumption” for each driving state (see FIG. 7). For example, “accelerated state evaluation value: Ey = (YY−yy)” from “accelerated state user fuel consumption: yy (ml / km)” and “accelerated state ideal fuel consumption: YY (ml / km)”. / YY ".

  FIG. 7 is a diagram illustrating an example of the fuel efficiency evaluation parameter. As illustrated in FIG. 7, the fuel efficiency evaluation parameter is determined using a large item (for example, idling or flying). It may be classified more finely than (for example, a stop state). Furthermore, it may be classified more finely than a large item (for example, vehicle speed) using a small item (for example, speed / slow).

  FIG. 5 is a diagram illustrating a flow of calculating a driving scene and a fuel saving evaluation parameter from driving history data for a specific node (intersection). Also in this case, first, data having the same road information (the same link ID and the same link direction) is extracted from the travel history data stored in the travel history data storage unit 12. And the data which can assume the condition which is drive | working the intersection are extracted from the same link data. When the same link data is arranged in time series, the first few data and the first few percent (ratio to the whole) data can be assumed to travel near the previous intersection. Therefore, when estimating a driving scene of a node (intersection), data that can assume a situation in which the vehicle is traveling at the previous intersection may be extracted from the same link data of the next link.

  From the data (running history data) extracted in this way, the scene estimation unit 13 has stopped or passed when the vehicle is traveling at the intersection, or the vehicle has made a right turn, left turn, or straight ahead at the intersection. Such information is obtained, and using the node scene model stored in the scene model storage unit 10, the driving scene of the vehicle when traveling at the intersection is estimated. For example, when the average speed of the vehicle is 0-5 km / h (0 km / h or more and less than 5 km / h) and the vehicle travels straight through the intersection, it is estimated as an “intersection stop scene” (see FIG. 6).

  As in the case of the link (road), the parameter calculation unit 14 uses the fuel consumption model stored in the fuel consumption model storage unit 11 and uses the fuel extraction model (travel history data) thus extracted from the fuel consumption evaluation parameter. (Evaluation value for each running state of the vehicle) is calculated. First, the parameter calculation unit 14 determines the traveling state of the vehicle from traveling history data (acceleration, vehicle speed, etc.). When the vehicle is traveling at an intersection, for example, when the vehicle speed is less than or equal to the threshold value x, it is “stop state”, and when the deceleration is less than or equal to the threshold value k for a certain time, it is “deceleration state”. And decide. In the example of FIG. 5, only “stop state” and “deceleration state” are shown as the driving state of the vehicle, but the case of the node (intersection) is the same as the case of the link (road) (in FIG. 4). Of course, “accelerated state”, “constant speed traveling state”, “stop and go state” and the like may be included in the traveling state of the vehicle.

  Next, the parameter calculation unit 14 obtains “user fuel consumption” for each driving state. For example, from the data such as the vehicle speed, acceleration, engine speed, accelerator opening, and travel distance included in the travel history data in the deceleration state section, using the user fuel efficiency model, “deceleration state user fuel consumption: kk (ml / ml km) ”. Further, the parameter calculation unit 14 obtains “ideal fuel consumption” for each traveling state. For example, “ideal fuel consumption in the deceleration state: KK (ml / km)” is obtained from the initial vehicle speed, travel distance, and the like in the deceleration state section using an ideal fuel consumption model. Then, the parameter calculation unit 14 obtains the “value of fuel consumption evaluation parameter (evaluation value)” from “user fuel consumption” and “ideal fuel consumption” for each driving state (see FIG. 7). For example, from “deceleration state user fuel consumption: kk (ml / km)” and “deceleration state ideal fuel consumption: KK (ml / km)”, “deceleration state evaluation value: Ek = (KK−kk)” / KK ".

  Next, a process for generating advice for fuel-saving driving will be described with reference to the drawings. This process is performed by the advice generation unit 18 of the client device 2.

  FIG. 9 is a diagram showing a flow of generating fuel-saving driving advice based on the difference value between the driving scene and the fuel-saving evaluation parameter. As described above, the comparison result of the fuel saving evaluation parameters included in the response from the server device 3 (response to the request) includes a difference value for each driving scene. For example, as shown in FIG. 9, it is assumed that the driving scene is a “general road congestion scene” and the traveling state having the maximum difference value is “acceleration”. In that case, among the advice data stored in the advice data storage unit 9 in a table format, the advice data for fuel-saving driving corresponding to the driving scene “general road congestion scene” and the driving state “acceleration” (for example, “On busy roads, look carefully at the movement of the car in front of you, and make sure you have enough space before accelerating slowly.”). In this way, the advice generation unit 18 determines the driving state (for example, acceleration state) of the fuel saving evaluation parameter having the maximum difference value for each driving scene of the vehicle (for example, general road congestion scene). Generate fuel-saving driving advice.

  Further, the advice generation unit may generate an advice that gives up the user's fuel-saving driving when the value of the fuel-saving evaluation parameter of a certain user is larger than the average value of the fuel saving evaluation parameters of other users. In this case, for example, even if the advice that gives up the fuel-saving driving is generated for the driving state in which the difference value between the value of the fuel-saving evaluation parameter of a certain user and the average value of the fuel-saving evaluation parameters of another user is the maximum, Good. Also in this case, a difference value with an average value among all users may be obtained, or a difference value with an average value in a group (for example, intermediate group) to which the user belongs may be obtained.

  The advice generation unit 18 is included in a searched route (for example, departure point → road A → road B → road C → destination) searched by a navigation device that provides route guidance from the departure point of the vehicle to the destination. For at least one of the route portions (for example, road A), a function of generating fuel-saving driving advice may be provided. Moreover, the advice generation part 18 may be provided with the function which produces | generates the advice of a fuel-saving driving | operation about the specific path | route part (for example, road D) designated by the user. Furthermore, the advice generation unit 18 has a function of not generating fuel-saving driving advice when the length of the route portion is shorter than a predetermined reference length (for example, when the length of the road A is 5 m). Also good. Note that the advice generation unit 18 is not the entire length of the route portion, but when the distance in which the predetermined traveling state is taken in the route portion is shorter than the predetermined reference distance (for example, the acceleration state is taken on the road A). When the distance is 5 m), a function of not generating fuel-saving driving advice may be provided. Further, the advice generation unit 18 may have a function of generating fuel-saving driving advice for a specific driving scene designated by the user (for example, a scene driving a crowded general road). Good.

  Next, the flow of operation (advice generation) of the fuel-saving driving support system 1 of the present embodiment will be described with reference to the drawings.

  FIG. 10 is a sequence diagram for explaining a flow of advice generation in the fuel efficiency driving support system. As shown in FIG. 10, when executing the advice generation, first, when the user inputs a request using the interface unit 8 (touch panel, remote control, etc.) of the client apparatus 2 (S1), the request generation of the client apparatus 2 is performed. The request is generated in the unit 15 (S2), and the request is transmitted to the server device 3 (S3).

  In the server device 3, based on the request from the client device 2, the parameter data storage unit 20 and the reference data storage unit 22 are referred to and compared with the fuel efficiency evaluation parameter of the user of the other client device 2, A difference value is obtained as a comparison result (S4). The response generation unit 26 of the server device 3 generates a response including the comparison result (difference value) (S5), and transmits the response to the client device 2 (S6).

  In the client device 2, on the basis of the comparison result (difference value) included in the response received from the server device 3, for each driving scene of the vehicle, the fuel-saving driving advice for the driving state of the vehicle having the maximum difference value Is generated (S7). The advice generated in this way is displayed on a display unit (not shown) such as a monitor and is notified to the user (S8). In addition, although the case where it alert | reports to a user by displaying advice on a monitor etc. was illustrated here, it cannot be overemphasized that you may alert | report to a user with an audio | voice etc ..

  According to such a fuel-saving driving support system 1 of the first embodiment of the present invention, fuel-saving driving advice that may be realized by the user is generated, and the user's fuel-saving driving is appropriately improved. be able to.

  In other words, in the present embodiment, the client device 2 mounted on the vehicle is based on the travel history data when the user drives the vehicle, and the fuel efficiency evaluation parameter for each travel state of the vehicle (the fuel efficiency evaluation of the user). Parameter) is calculated and uploaded to the server device 3. The parameter data storage unit 20 of the server device 3 stores the fuel efficiency evaluation parameters of a plurality of users (for example, users A to Z). Based on a request from a certain client device 2, the user ( For example, the fuel efficiency evaluation parameter of the user A) is compared with the fuel efficiency evaluation parameters of the users (for example, the users B to Z) of the other client devices 2, and the comparison result is sent to the client device 2 (request is sent). To the client device 2). The client device 2 generates fuel-saving driving advice based on the comparison result included in the response from the server device 3.

  In the present embodiment, when generating fuel-saving driving advice for a certain user (for example, user A), the degree of realization of the user's fuel-saving driving and the fuel efficiency of other users (for example, users B to Z). Comparison results with the degree of realization of driving are taken into account. Therefore, another user (for example, user B) has realized fuel-saving driving for a certain traveling state (for example, a stop state, an acceleration state, a deceleration state, a constant speed traveling state, a stop-and-go traveling state, etc.) ( If the user (for example, user A) has not achieved fuel-saving driving (the degree of realization is low) in spite of the high degree of realization, advice on the fuel-saving driving in the traveling state is generated. The In this manner, it is possible to generate fuel-saving driving advice that has a possibility (room for improvement) that can be realized for the user (for example, user A). Therefore, the fuel-saving driving of the user (for example, user A) can be improved appropriately.

  Further, in the present embodiment, the client device 2 is based on the travel history data, based on the driving history data. And the like are uploaded to the server device 3. In the server device 3, when a request from a certain client device 2 is made, for each driving scene of the vehicle, the value of the fuel efficiency evaluation parameter of the user of the client device 2 (for example, the evaluation value of the acceleration state of the user A: 5. Evaluation value of deceleration state of user A: 3) and maximum value (for example, evaluation value of acceleration state of user B: 10, evaluation value of user B's fuel efficiency evaluation parameter) Difference values from the deceleration state evaluation value: 4) (for example, acceleration state difference value: 5 = 10-5, deceleration state difference value: 1 = 4-3) are obtained.

  In this case, that the difference value is large means that the possibility (room for improvement) that can be realized for the user (for example, user A) is large. The client device 2 generates fuel-saving driving advice for the driving state (for example, acceleration state) in which the difference value is the maximum in each driving scene of the vehicle. In this way, fuel-saving driving advice that is likely to be realized by the user for each driving scene of the vehicle (for example, “On a busy road, look closely at the movement of the previous car and ”Let's try to accelerate slowly after opening.” Can be generated, so that the user's fuel-saving driving can be appropriately improved for each driving scene.

  Further, in the present embodiment, the fuel-saving driving in the route portion (for example, road A) included in the searched route (for example, departure place → road A → road B → road C → destination) searched by the navigation device. Advice is generated. Therefore, when route guidance is performed by the navigation device, advice on fuel-saving driving useful for traveling along the route portion can be obtained, and the user's fuel-saving driving can be appropriately improved.

  Moreover, in this Embodiment, the advice of the fuel-saving driving | operation in the specific path | route part (for example, road D) designated by the user is produced | generated. Therefore, for example, if the user designates a route portion (for example, road D) on the map, advice on fuel-saving driving useful when traveling on the route portion is obtained, and the user's fuel-saving driving is appropriately performed. Can be improved.

  Further, in the present embodiment, when the length of the route portion is short (for example, when the length of the road A is 5 m), the fuel-saving driving advice in the route portion is not generated. In this way, when the fuel saving effect is low, the creation of advice is suppressed, and the user's fuel saving driving can be improved appropriately.

  Further, in the present embodiment, fuel-saving driving advice is generated in a specific driving scene designated by the user (for example, a scene driving on a crowded general road). Therefore, for example, if a user designates a certain driving scene, advice on fuel-saving driving useful in such driving scene can be obtained, and the user's fuel-saving driving can be appropriately improved.

(Second Embodiment)
Next, the fuel-saving driving support system 1 according to the second embodiment of the present invention will be described. Here, the fuel-saving driving support system 1 according to the second embodiment will be described with a focus on differences from the first embodiment. Unless otherwise specified, the configuration and operation of the present embodiment are the same as those of the first embodiment.

  FIG. 11 is an explanatory diagram showing the configuration of the fuel-saving driving support system 1 of the present embodiment. As shown in FIG. 11, the fuel-saving driving support system 1 includes a client device 2 mounted on a user's vehicle and a server device 3 installed in a facility such as a center, as well as a computer used by the user at home or the like. A device 27 is provided. The computer device 27 is, for example, a personal computer or a portable terminal. Here, the computer device 27 corresponds to the second client device of the present invention.

  FIG. 12 is a block diagram for explaining the configuration of the computer device 27. As shown in FIG. 12, the computer device 27 includes an interface unit 28 (I / F unit) such as a keyboard, a mouse, and a touch panel for a user to perform an input operation.

  The computer device 27 also includes a request generation unit 29 that generates a request for the server device 3 when acquiring fuel-saving driving advice, and an advice acquisition unit 30 that acquires advice from the server device 3 as a response to the request. ing. Further, the computer device 27 includes a communication unit 31 that performs information communication with the server device 3 via the network 4. The request generated by the request generation unit 29 is transmitted to the server device 3 via the communication unit 31. The response (advice and difference value) returned from the server device 3 is received via the communication unit 31 and acquired by the advice acquisition unit 30.

  FIG. 13 is a block diagram for explaining the configuration of the server device 3. As shown in FIG. 13, in addition to the same configuration as that of the first embodiment, this server device 3 is used for an advice data storage unit 32 for storing fuel-saving driving advice data, and for estimation of driving scenes. A scene model storage unit 33 that stores a quantification model (scene model) and an advice generation unit 34 that generates fuel-saving driving advice for the user are provided.

  The operation of the fuel-saving driving support system 1 according to the second embodiment configured as described above will be described with reference to the drawings.

  FIG. 14 is a sequence diagram for explaining a flow of advice generation in the fuel efficiency driving support system of the present embodiment. As shown in FIG. 14, when executing the advice generation, first, when the user inputs a request using the interface unit 28 (keyboard, mouse, etc.) of the computer device 27 (S10), the request generation of the computer device 27 is performed. The request is generated by the unit 29 (S11), and the request is transmitted to the server device 3 (S12).

  In the server device 3, based on the request from the computer device 27, the parameter data storage unit 20 and the reference data storage unit 22 are referred to and compared with the fuel efficiency evaluation parameter of the user of the other client device 2, A difference value is obtained as a comparison result (S13). In the present embodiment, the server device 3 provides advice on fuel-saving driving for the driving state of the vehicle having the maximum difference value for each driving scene of the vehicle based on the comparison result (difference value). Is generated (S14). The response generation unit 26 of the server device 3 generates a response including the comparison result (difference value) and advice (S15), and transmits the response to the computer device 27 (S16).

  When the computer device 27 acquires the advice included in the response received from the server device 3, the computer device 27 displays the acquired advice on a display unit (not shown) such as a monitor to notify the user (S17).

  In the above description, an example in which advice is displayed on a display unit (not shown) such as a monitor has been described. However, a difference value may be displayed instead of advice. As a method of displaying the difference value, the number of the difference value may be displayed as it is, or may be displayed using a display mark or the like. Further, the difference values may be ranked, and some or all of the top rankings may be displayed.

  Also by the fuel-saving driving support system 1 according to the second embodiment of the present invention, the same operational effects as those of the first embodiment are exhibited.

  In addition, in the present embodiment, the server device 3 generates a fuel-saving driving advice for the user based on a request from the user's computer device 27 (for example, a personal computer device). Sent. Therefore, the user can obtain advice on fuel-saving driving by using the computer device 27 even from outside the vehicle (for example, at home), and the convenience for the user is improved.

  The embodiments of the present invention have been described above by way of example, but the scope of the present invention is not limited to these embodiments, and can be changed or modified according to the purpose within the scope of the claims. is there.

  As described above, the fuel-saving driving support system according to the present invention has the effect of generating fuel-saving driving advice that may be realized by the user and appropriately improving the user's fuel-saving driving. However, it can be applied to a navigation system for a vehicle and is useful.

1 Fuel-saving driving support system 2 Client device 3 Server device 4 Network 5 CAN
6 Navi ECU
7 User identification unit 8 Interface unit 9 Advice data storage unit 10 Scene model storage unit 11 Fuel consumption model storage unit 12 Travel history data storage unit 13 Scene estimation unit 14 Parameter calculation unit 15 Request generation unit 16 Difference value acquisition unit 17 Communication unit 18 Advice Generation unit 19 Communication unit 20 Parameter data storage unit 21 Parameter update unit 22 Reference data storage unit 23 Reference data update unit 24 Difference value calculation unit 25 Difference value data storage unit 26 Response generation unit 27 Computer device 28 Interface unit 29 Request generation unit 30 Advice acquisition unit 31 Communication unit 32 Advice data storage unit 33 Scene model storage unit 34 Advice generation unit

Claims (8)

In a fuel-saving driving support system comprising a client device mounted on a vehicle and a server device that is communicably connected to the client device,
The client device is
A parameter calculation unit that calculates a fuel saving evaluation parameter that evaluates the degree of realization of the user's fuel saving driving for each driving state of the vehicle based on driving history data when the user drives the vehicle;
An upload unit for uploading the user's fuel saving evaluation parameter to the server device;
An advice generating unit for generating fuel-saving driving advice for the user;
With
The server device
A storage unit for storing fuel efficiency evaluation parameters of a plurality of users uploaded from a plurality of client devices;
Based on a request from one client device, the fuel consumption evaluation parameter of the user of the one client device is compared with the fuel consumption evaluation parameter of the user of the other client device by referring to the storage unit, and the other A parameter comparison unit for obtaining a difference value between the value of the fuel efficiency evaluation parameter of the user of the client device and the value of the fuel efficiency evaluation parameter of the user of the one client device as a comparison result ;
As a response to the request, a response transmission unit that transmits a comparison result in the parameter comparison unit to the one client device;
With
The advice generation unit provides advice on the fuel-saving driving for the driving state of the vehicle with the fuel-saving evaluation parameter having the maximum difference value based on the comparison result included in the response from the server device. A fuel-saving driving support system characterized by generating. The client device further includes a scene estimation unit that estimates a driving scene of the vehicle based on the travel history data,
The upload unit uploads the fuel efficiency evaluation parameter for each driving scene of the vehicle to the server device,
The parameter comparison unit, for each driving scene of the vehicle, between the highest value of the fuel efficiency evaluation parameter values of the user of the other client device and the value of the fuel efficiency evaluation parameter value of the user of the one client device. A difference value is obtained as the comparison result,
The said advice generation part produces | generates the said fuel-saving driving | operation advice about the driving state of the said vehicle of the fuel-saving evaluation parameter whose said difference value was the largest for every driving scene of the said vehicle. Fuel-saving driving support system.   The advice generation unit generates the fuel-saving driving advice for at least one of the route portions included in the searched route searched by the navigation device that performs route guidance from the departure point to the destination of the vehicle. The fuel-saving driving support system according to claim 2.   4. The fuel-saving driving support system according to claim 2, wherein the advice generation unit generates the fuel-saving driving advice for a specific route portion designated by the user. 5.   The fuel-saving driving support system according to claim 3 or 4, wherein the advice generation unit does not generate the fuel-saving driving advice when the length of the route portion is shorter than a predetermined reference length.   The fuel-saving driving support system according to any one of claims 2 to 5, wherein the advice generation unit generates the fuel-saving driving advice for the specific driving scene specified by the user. The server device
A second advice generating unit that generates the fuel-saving driving advice based on the comparison result in the parameter comparing unit based on a request from the second client device of the user;
An advice transmitter for transmitting the fuel-saving driving advice generated by the second advice generator to the second client device;
A fuel-saving driving support system according to any one of claims 1 to 6, comprising: A method used in a fuel-saving driving support system comprising a client device mounted on a vehicle and a server device communicably connected to the client device,
In the client device,
Calculating a fuel saving evaluation parameter that evaluates the degree of realization of the user's fuel saving driving for each driving state of the vehicle based on the driving history data when the user drives the vehicle;
Uploading the user's fuel efficiency evaluation parameters to the server device;
In the server device,
Storing fuel efficiency evaluation parameters of a plurality of users uploaded from a plurality of client devices in a storage unit;
Based on a request from one client device, the fuel consumption evaluation parameter of the user of the one client device is compared with the fuel consumption evaluation parameter of the user of the other client device by referring to the storage unit, and the other Obtaining a difference value between the value of the fuel efficiency evaluation parameter of the user of the client device and the value of the fuel efficiency evaluation parameter of the user of the one client device as a comparison result ;
Sending the comparison result to the one client device as a response to the request;
In the one client device,
Based on the comparison result included in the response from the server device, the fuel-saving driving advice to the user of the one client device regarding the running state of the vehicle of the fuel-saving evaluation parameter having the maximum difference value Generating
A method comprising the steps of: